/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "i2c.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "aht20.h"
#include "stdio.h"
#include "string.h"
#include "oled.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint8_t state=0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
//实现定时器中断回调函数
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if (htim->Instance == TIM4)
  {
    //串口3发送数据
    HAL_UART_Transmit_DMA(&huart3, (uint8_t *)"Hello World!\r\n", 14);
  }
  
}

//实现输入捕获中断回调函数,当TIM1的通道4捕获到数据时触发
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
  if (htim->Instance == TIM1)
  {
    if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_4)
    {
      //计算
      uint32_t time = HAL_TIM_ReadCapturedValue(&htim1, TIM_CHANNEL_4) - HAL_TIM_ReadCapturedValue(&htim1, TIM_CHANNEL_3);
      float distance = time * 0.034/2;
      //发送数据
      char buffer[64];
      sprintf(buffer, "距离: %.2f cm", distance
      );
      OLED_NewFrame();
      OLED_PrintString(0, 0, buffer, &font16x16, OLED_COLOR_NORMAL);
      OLED_ShowFrame();
    }
    
  }
}
  

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_I2C1_Init();
  MX_USART3_UART_Init();
  MX_TIM4_Init();
  MX_TIM1_Init();
  /* USER CODE BEGIN 2 */
  //初始化AHT20
  AHT20_Init(&hi2c1);
  //初始化OLED
  HAL_Delay(20);
  OLED_Init();

  //定时器开始计时
  HAL_TIM_Base_Start_IT(&htim4);
 // HAL_TIM_Base_Start_IT(&htim2);

  //输入捕获开始计时
  HAL_TIM_Base_Start(&htim1);
  HAL_TIM_IC_Start(&htim1, TIM_CHANNEL_3);
  HAL_TIM_IC_Start_IT(&htim1, TIM_CHANNEL_4);

  //float temperature, humidity;---------------------
  //char buffer[64];
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {

    //拉高Trig引脚
    HAL_GPIO_WritePin(TRIG_GPIO_Port, TRIG_Pin, 1);
    //延时1us
    HAL_Delay(1);
    //拉低Trig引脚
    HAL_GPIO_WritePin(TRIG_GPIO_Port, TRIG_Pin, 0);
    //清除定时器1的计数值
    __HAL_TIM_SET_COUNTER(&htim1, 0);
    HAL_Delay(50);
    //等待Echo引脚变高
    
    /* AHT20测试代码
    if (state == 0)
    {
      AHT20_StartRead(&hi2c1);
    }
    else if (state == 2)
    {
      HAL_Delay(75);
      AHT20_Get();
    }
    else if (state == 3)
    {
      AHT20_GetData(&temperature, &humidity);
      sprintf(buffer, "Temperature: %.1f, Humidity: %.1f %%\r\n", temperature, humidity);
      HAL_UART_Transmit_DMA(&huart3, (uint8_t *)buffer, strlen(buffer));
      HAL_Delay(1000);
      state = 0;
    }
    */
    
    /* 显示定时器计数值
    OLED_NewFrame();
    sprintf(buffer, "Timer4: %lu", __HAL_TIM_GET_COUNTER(&htim4));
    OLED_PrintString(0, 0, buffer, &font16x16, OLED_COLOR_NORMAL);
    sprintf(buffer, "Timer2: %lu", __HAL_TIM_GET_COUNTER(&htim2));
    OLED_PrintString(0, 20, buffer, &font16x16, OLED_COLOR_NORMAL);
    OLED_ShowFrame();

    */

    /* 显示温度·湿度 
    OLED_NewFrame();
    sprintf(buffer, "温度: %.1f", temperature);
    OLED_PrintString(0, 0, buffer, &font16x16, OLED_COLOR_NORMAL);
    sprintf(buffer, "湿度: %.1f %%", humidity);
    OLED_PrintString(0, 16, buffer, &font16x16, OLED_COLOR_NORMAL);
    OLED_ShowFrame();
    */

    /* 显示图片
    OLED_NewFrame();
    OLED_DrawImage(30, 4, &bilibiliTVImg, OLED_COLOR_NORMAL);
    OLED_ShowFrame();
    */
    

    
    
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
